the secretary says that iraq has been helping prop up assad as he fights for power there. kerry making an unannounced visitor to iraq and meeting with nuri al-maliki. and stopping the flow of weapons into neighboring syria. weapons that are only making the civil war more deadly. and steve centanni is here. how are they flowing into syria? >> reporter: according to u.s. officials there are flights just about every day, from iran to syria travelling across the iraqi air space. iran says they carry humanitarian aid, but u.s. says they carry weapons to the syrian government. and secretary of state john kerry urged al-maliki to crack down on the flights requiring they land in iraq for inspection before continuing on to syria. >> we had a very spirited discussion on the subject of the overflights and i made it very clear, anything that supports president assad is problematic. >> kerry suggested the future of u.s.-iraqi relations is hanging in the balance here, harris. >> harris: given the recent talks and the possibility of chemical weapons used on citizens and we saw the actual